Large cubical lump.
An example of the element Yttrium

Large cubical lump.
Dave Hamric sells elements on his website and on eBay. He donated this beautiful chunk of yttrium as a sample to show the sorts of things he can supply: If you need some rare earths, contact him or check out his eBay auctions.

This looks like distilled metal, probably of high purity, probably from China: He asked me to have it analyzed so soon I'll have a specific purity determination.